Lock



P. BOYKO June: 11', 1935.

' LOCK Filed March 23', 1932 INVENTOR PETER BOYKQ Patented June 11, 1935UNITED STATES PATENT OFFICE Application March 23,

1 Claim.

The invention relates to locks which require for their successfulmanipulation in throwing the bolt into unlocked position a necessity ofemploying not only the proper key in case a 5 key-controlled form of theinvention is em ployed, or the knowledge of the proper combination incase a combination form of the device is used, but also requires aknowledge on the part of the operator as to how the key or controllingknob of the combination must be rotated in order to throw the bolt.

Accordingly, the primary object of the invention is to provide a simpleform of safety lock which can be fitted to opposite sides of doors andother supports having different thicknesses and which can be readilyoperated by a person who has the knowledge as to how the proper controlagency, be it either key or combination control knob, should beactuated.

Still another object of the invention is to provide such form of dualcontrolling feature lock which can be readily reorganized so as tochange its tumbler arrangement and thus work with a different form ofkey or with a different dial combination.

Broadly these objectives are attained by providing a two partconstruction fitted to opposite sides of the door. One part comprises atumbler barrel which may be either key actuated or dial controlled as iswell known inlocks of this character, and the other part providing alock casing containing a sliding bolt. The bolt is actuated by a breaktoggle arrangement of levers contained in the casing, one pivoted to thebolt and the other pivoted in the casing and actuated from a connectingbar in turn actuated from the tumbler barrel. The levers are arranged insuch way that the barrel controlled lever is free to turn in eitherdirection idly and without throwing the bolt when the controlling barrelis indiscriminately rotated by an unauthorized person, or even by aperson who has the proper key or knows the proper combination to operatethe barrel. The disclosure features a construction of the operatinglevers organized so that a notch in the end of one can be rotated intoengagement with the end of the other and then by a reverse movement ofthe barrel when this end to end engagement has been effected will shiftthe bolt into its unlocking position.

Various other objects and advantages of the invention will be in partobvious from an inspection of the accompanying drawing and in part willbe more fully set forth in the follow 1932, Serial No. 600,588

ing particular description of one form of mechanism embodying theinvention, and the invention also consists in certain new and novelfeatures of construction-and combination of parts hereinafter set forthand claimed.

In the accompanying drawing:

Fig. l is a view partly in vertical section of a preferred embodiment ofthe invention with part of the cover plate of the lock casing removed,to expose to view the bolt and associated parts; and with part of thecasing broken away to expose the rear or inner end of the actuatingknob; and showing the parts in full line with the bolt in lockedposition;

Fig. 2 is a view of the inside of the removable cover plate; i

Fig. 3 is a view corresponding to the showing in Fig. lwith the coverplate in position; the bolt shown in dotted outline and shifted into itsunlocked position and viewing the lock casing from the side engaging thesupport as show in Fig. 4; and v Fig. 4. is a transverse sectional viewtaken through the casing on the plane indicated by the line 4-4 of Fig.3 and showing the casing assembled on one side of a support-in operativeengagement with the tumbler barrelinset into the opposite side of thesupport.

Itis understood that the device herein disclosed comprises two majorparts; a'lock casing in and a tumbler barrel H, mounted in position onasupport l2, such as a door shown in Fig. 4., and preferably inset intoopposite faces of the support as is well known in mounting locks of thischaracter in place.-

In the illustrated form of the invention the barrel H includes the.usual tumbler controlled cylinder l3 which'is rotated when the properkey M is inserted into the key slot l5 access to which is provided onthe outside of the support 12. While the device has been disclosed inconnection with this type of tumbler controlled barrel, it is understoodthat barrel Il may be of the dial controlled type in which the barrel I3is rotated only when an exposed dial knob has been rotated theprescribed number of degrees and in the prescribed direction for whichthe combination is set as is usual with safe locks. In either case, whenthe barrel is prop erly rotated it in turn rotates a spacing'bar I6which projects towards and into the lock casing ID as hereinafterdescribed. It isunderstood that the spacing bar I6 is of the usuallength so as to reach between the major parts when mounted in supportsl2 of varying thicknesses and that any excess in length of the spacingbar may be out off if necessary in mounting the lock in place.

The lock casing l0 comprises essentially a hollow box I'i opened alongits inner side which inner side is closed by means of a cover plate [8.The casing as a whole is mounted on the inner side of the support l2 bymeans of screws passed through the screw apertures 19 in the casing andcover plate. The cover plate 18 is provided with an opening 20 extendingtherethrough'and which opening provides a bearing for the hub 2| of anotched end lever 22 which extends laterally across the inner side ofthe cover plate l8. It is a feature of this disclosure that when thecover plate I8 is removed it carrice with it the notched lever and canthus be removed from the lock casing without necessity; of disconnectingthe lever from any of the bolt actuating parts carried by the casing andherei aiter described. The casing is provided with guidebars 23 formedintegral with its bottom and slidably mounted on these bars is a boltThis bolt is provided with projecting fingers 25 designed to engage inapertures in keepers 26 secured toa mounting plate 21 as is usual inconstructions of this character. The bolt is normally urgedinto itslocking position by means of spring 28. d

Pivotally mounted on one side of the bolt 24 is a thrust member 29provided on opposite sides with balancing springs 30 and 31 whichtendnormally to maintain its free end 32 in the path of rotary movementof the lever 22. The end oi the lever 22 is provided at its free endwith an angularly disposed notch 33 higher on one side than on the otheras particularly shown in Figs. 2 and 3. Hub 2| of lever 22 is providedat its center with a bar slot 34 into which is intruded the end of barl6 as particularly shown in Fig. 4. The inclination of the sides formingthe slot 33 are so disposed that when thelever. 22 is rotated inanti-clockwise direction a s indicated in dotted lines in Fig. l, thelever simply bears against the upper side of the thrust member andworking against spring 3i simply moves idly past the lever when turnedin this'direction without affecting the thrust member and withoutaffecting the position of the bolt. It is likewise true that the lever22 can be rotated in a clockwise direction and in the absence ofknowledge as to where it should be stopped this rotary movement, it cansimply be turned idly and will similarly pass the thrust member withoutshifting the bolt 24 when turned in this direction. However, if the keyl4 or the controlling dial'of the combination controlled barrel berotated carefully in the di'rectionto turn the lever 22 in Fig. 1 in aclockwise direction and until the notched end has shifted to a positionwhere thefree end of the thrustmember is in engagement with the slot 33the parts will then be in the position indicated in the upper dottedline showing in Fig. ;-1 and in the showing in Fig. 3. Then by a reverseoranti-clockwise movement of the key n-dial knob the-notched end 33 ofthe lever 22 bears endwise against the thrust member 29 to shiftthe'same from the upper, dotted line position shownin Fig. 1 into theunlocked dotted line position shown in Fig. 3. It will be seen thatthe-lever 22 andthrust member 29 form in effect atoggle-construction, asshown in Fig. 3, whichtend to straighten out as rthelever 22 is rotatedcounter-clockwise thus shifting-the bolt into its unlocking positionagainst the tension of its return spring 28.

Rerotating level 22 clockwise from its position shown in Fig. 3,releases tension on the thrust member and permits the spring 23 torestore the lock to its normal locking position shown in Fig. 1. As soonas the thrust member is free from the pressure of the actuating lever 22the springs 30 and 3| act to restore the thrust member into its normalinoperative position with the end 32 projecting towards. the hub .22 asshown in full lines in Fig. 1. 4

It is understood that the lock casing may contain other features suchfor'instance as the bolt shifting knob 38 mounted for rotary movement inthebottom of casing l0 and provided on its inner side with a finger 35designed to bear on shoulder, 36 of the bolt to shift the bolt into openposition against the tension of spring 28. The casing may also beprovided with a manually controlled plunger 39 for locking the bolt inits unlocked position, as shown in Fig. 3. A screw 40 passed throughaperture 4| in cover plate itand engaging in spacing lug 42 acts tosecure the cover plate to the casing.

In marketing devices of the. type-herein disclosed, it is possible tomanufacture the lock casing and its contained parts as a standard unitwhich can be combined with tumbler barrels of different types andwherein the tumblers can be rearranged as is well known in tumbler locksof this character. As the spacing bar I6 can accommodate itself tovarying distances at which the lock casing and barrel may be spacedapart, it is possible to mount the. construction herein disclosed indoors and other parts of various thicknesses and even on a support sothick that it would be impractical to provide a key sufiicientlylong toextend through the same to engage the lock casing. It is, of'course,possible to change the tumbler combination so that the device can beoperated with a key differing from the key originally used and thisresetting of theytumbler parts can be attained without making any changein or even dismounting the bolt containing casing. It is noted that thehub 21 is mounted fixed axially relative to the :axis about which itturns and there is thus assured a registering of the free ends of lever22 and the thrust lever which is in no way dependent upon the accuracyof fit of the controlling key [4 in its slot l5 and, in fact is in noway dependent uponthe key except insofar as thekey controls the rotationof the barrel in which it is contained.

I claim:

A look including a casing in the form of a hollow-box open at its innerside, said box provided on the inner side of its bottom with integralguide barsand with an integral bolt :stop, abolt slidablyxmounted in theguide bars and provided with projecting fingers, a bolt spring acting onthe bar and urging'it towards said stop, a manually actuated boltshifting knob mounted for rotary movement in, and extending through thebottom of the 'box and :provided with a lever adapted to engage the boltfor moving it into its open position against the tension of said spring,apointed end lever pivotally mounted on the side of the bolt facing theopen side of the box and constituting :a thrust member, a pair of studspositioned on opposite sides 10f the axis of rotation 'of -1th6 lever,a-pair-of balancing springs'with on'eend of each coiled about one of thestuds and having their free ends bearing on opposite sides of the thrustlever, a cover plate for closing the open side of the box, a notched endlever provided with a hub journalled for rotary movement about a fixedaxis in the cover plate, said hub provided with a slot adapted toreceive a spacing bar of a tumbler lock, said lever extending across theinner side of the cover plate and removable bodily therewith withoutafiecting the bolt and its associated parts carried by the box, the freeend of said lever provided with an angularly disposed notch higher onone side than on the other to form a shoulder and disposed when thelever is rotated in one direction to bear on the thrust lever and movepast the same and when moved in the opposite direction to cause the endof the thrust member to engage in said recess and when reverse therefromto engage said shoulder to shift the bolt into its open position andagainst the tension of the bolt spring.

PETER BQYKO.

